固相反应合成磷酸四钙的物相演变

Phase Transition of Synthesizing Tetracalcium Phosphate in a Solid-state Reaction

采用TGA-DSC、FTIR及XRD等方法研究了固相反应法合成磷酸四钙(TTCP) 的物相演变过程.结果表明,1200℃以上物相变化与CaO-P2O5-H2O)的高温相图基本一致, 1200℃以下的物相变化为绘制CaO-P2O5-H2O低温相图提供重要数据;通过揭示固相合成 TTCP物相演变的全过程,为制备出纯TTCP这一重要的磷酸钙骨水泥组成材料提供重要理 论依据.

The phase transition course of synthesizing tetracalcium phosphate in a solid-state reaction was investigated by TGA-DSC, XRD and FTIR. The results show that the phase transformations occurring over 1200 degrees C are consistence with the high temperature phase diagram of CaO-P2O5-H2O. In view of lack of the low temperature phase diagram, the phase transitions below 1200 degrees C can offer significant data to draw it; understanding the whole course of phase evolution contributes to optimum the synthesizing process to get pure TTCP, the most important biomaterial in the field of calcium phosphate cement.